BCH210H1 Lecture Notes - Lecture 4: Tripeptide, Dipeptide, Tetrapeptide

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peachzebra67

31 May 2012

School

UTSG

Department

Biochemistry

Course

BCH210H1

Professor

Stavroula Andreopoulos

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BCH210H1 Full Course Notes

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Protein structure fibrous proteins have simple linear structures insoluble in water globular proteins spherical shape very soluble in water. Membrane proteins insoluble in aqueous solutions but can be solubilized in detergents. Protein structure has four levels of organization. Peptide short polymers of amino acids. Dipeptide, tripeptide, tetrapeptide two, three and four amino acid residues long, amino acid residue a single unit in a peptide respectively. Oligopeptide more than 12 and less than 20 amino acid residues. Polypeptide long chain of amino acids. Protein composed of one or more polypeptide chains. Multimeric protein more than one polypeptide chain. Homomultimeric protein multimeric protein that contains only one kind of polypeptide.

Related Questions

From the list of amino acids given, select the pair that will form a hydrophobic interaction between R groups on different protein subunits and classify the level of protein structure. serine, valine, leucine, glutamine, glutamic acid, lysine

options:

a)Serine and valine will form a hydrophobic interaction; quaternary structure.

b)Glutamic acid and glutamine will form a hydrophobic interaction; tertiary structure.

c) Lysine and leucine will form a hydrophobic interaction; secondary structure.

d) Valine and leucine will form a hydrophobic interaction; quaternary structure.

e) None of the above is correct.

Is the primary structure of a 50 kD protein the same or different than the primary structure of the 250 kD protein? Explain briefly, relating to the structure levels of proteins.

Is the secondary structure of the 50 kD protein the same or different than the secondary structure of the 250 kD protein? Explain briefly relating to the structure levels of proteins.

Is the quaternary structure of the 50 kD protein the same of different than the quaternary structure of the 250 kD protein? Explain briefly relating to the structure levels of proteins.

sangriabee794

Choose all of the correct statements about protein structure. Hint: For each level of structure, only one statement is correct.

	Primary structure is due to covalent bonding between amino acids.
	Primary structure is due to hydrogen bonding between amino acids.
	Primary structure is due to hydrogen bonding, ion-ion interactions, and van der Waals interactions between amino acids.
	Secondary structure is due to covalent bonding between amino acids.
	Secondary structure is due to hydrogen bonding between amino acids.
	Secondary structure is due to hydrogen bonding, ion-ion interactions, and van der Waals interactions between amino acids.
	Tertiary and quaternary structure is primarily due to covalent bonding between amino acids.
	Tertiary and quaternary structure is primarily due to hydrogen bonding between amino acids.
	Tertiary and quaternary structure is primarily due to the hydrophobic effect, hydrogen bonding, ion-ion interactions, and van der Waals interactions.

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BCH210H1 Lecture Notes - Lecture 4: Tripeptide, Dipeptide, Tetrapeptide

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